Long Hill Mine: Calcite & Fluorite Rockhounding in Greater Bridgeport Planning Region, Connecticut

Updated June 2026

Long Hill Mine is a mapped rockhounding spot in Greater Bridgeport Planning Region, Connecticut. Reported finds include calcite, fluorite, pyrite cubes, scheelite, blue topaz. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Greater Bridgeport Planning Region
State: Connecticut
Nearest road: Old Mine Road
Postcode: 06611
Coordinates: 41.28886, -73.22642

Geology at Long Hill Mine

This spot sits on Basal member [of The Straits Schist], mapped as schist, amphibolite, and marble that formed roughly 445 to 420 million years ago. Metamorphic belts like this often host pegmatite dikes, the coarse-crystal bodies that typically carry beryl, tourmaline, and sheet mica.

Mapped unit: Basal member [of The Straits Schist]
Age: 445–420 Ma (Silurian)
Rock types: schist, amphibolite, and marble
Elevation: 430 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Best time to visit Long Hill Mine

Best months: March to November. Typical highs run 81°F in midsummer and 35°F in midwinter, with winter lows near 17°F.

Climate normals: NOAA 1991-2020 monthlies, ANSONIA 1 NW station (8 mi away), adjusted for elevation.

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.

Sources & verification

Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at Long Hill Mine

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Nearby rockhounding spots

Other rockhounding spots within driving distance of Long Hill Mine.

Across the state line from Long Hill Mine

Long Hill Mine is close enough to the Connecticut border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Long Hill Mine FAQ

Where is Long Hill Mine?+

Long Hill Mine is in Greater Bridgeport Planning Region, Connecticut, at 41.28886, -73.22642. Nearest road: Old Mine Road.

What rocks and minerals can you find at Long Hill Mine?+

Long Hill Mine is reported to produce Calcite, Fluorite, Pyrite Cubes, Scheelite, Blue Topaz.

Is collecting allowed at Long Hill Mine?+

Generally open to casual rockhounding. Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Long Hill Mine?+

A rock hammer, a pry bar, gloves, and safety glasses suit pegmatite ground. Work weathered zones and check dump piles; coarse crystals often sit in decomposed rock.

When is the best time to visit Long Hill Mine?+

The most comfortable months at Long Hill Mine are March to November.

How do I get to Long Hill Mine?+

Open the directions link to navigate to 41.28886, -73.22642 in Google Maps. The nearest road is Old Mine Road.

More rockhounding in Connecticut

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Open Long Hill Mine on the map

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